Maintenance of climate engineering requires periodic intervention, especially when it comes to the hygiene of internal components.The Xiaomi Smartmi Air Humidifier 2 model (often referred to as the CJXJSQ02ZM) is famous for its minimalist design and efficiency, but over time, owners face the need to deep clean or replace worn parts.
Many users are afraid to open the device for fear of losing the warranty or damaging fragile mounts. However, if the warranty period has already expired, disassembling the case yourself becomes the only economical way to extend the life of the gadget. It is important to understand that the internal design of this humidifier does not involve the use of screws on the outer casing, which often confuses inexperienced craftsmen.
In this article, we will take a closer look at the dismantling process, focusing on hidden latches and proper electronics handling. You will learn what tools you will need to work and how to avoid the typical errors that can lead to plastic cells breaking down.
⚠️ Warning: Before starting any work, be sure to disconnect the humidifier from the power grid.
Preparation of the workplace and necessary tools
You can't do a good job without a properly prepared space. You'll need a clean, well-lit table, covered with soft cloth to eliminate scratches on the glossy plastic of the case. The main tool you'll need is a plastic shoulder blade or a mediator, because metal objects can leave traces.
To unscrew the internal screws will require a cross screwdriver size PH1 or PH2. In some versions, the screws can be quite long, so make sure that the screwdriver sting is securely fixed in the hat, also it will be useful to prepare tweezers to extract small parts and a brush to clean the dust.
Be sure to prepare the screw folding container, as their sizes may vary. Losing even one small screw can cause the body to not assemble tightly and the device will begin to vibrate when operating.
- 🛠️ Plastic blade or mediator for opening latches
- 🔧 Cross screwdriver (PH1/PH2) screw-on
- 🧹 Soft brush and dry rags for cleaning
- 📱 Tweezers for working with small connectors
Organize the process so that nothing distracts you from the task, and rushing to do so is the main enemy, leading to the breakdown of plastic fixtures.
☑️ Ready to disassemble
Removal of external elements and upper cover
The first step is to dismantle removable parts that don't require tools, remove the top grille and remove the water softening cartridge if it's installed, and then remove the water tank by flipping the device over or gently lifting it, depending on the modification of the mount.
The challenge is to remove the top decorative ring and the safety net, which are held on the inner grooves, and carefully press the side edges and turn counterclockwise to unlock the locking mechanism, and don't put too much effort into not breaking the guide pins.
Once the tops are removed, you'll be able to access the inner cavity of the evaporator, and that's where the lime plaque and mucus that need to be removed most often accumulate, and visually look at the ultrasonic membrane at the bottom of the bowl.
⚠️ Warning: Never use sharp metal objects to scrape plaque off an ultrasonic membrane, which will cause permanent damage to the thin coating.
If you plan to completely disassemble electronics, you need to be especially careful at this stage. the upper part of the case can be connected to the main board with a flexible plume, although the Humidifier 2 model more often uses wireless data transfer between modules.
Dismantling the main body and access to electronics
To get to the heart of the device, you have to separate the top and bottom of the body, and unlike the older models, there are no visible screws on the outside, and the attachment is made by powerful plastic latches located around the perimeter of the junction.
Insert a plastic blade into the gap between the top and bottom of the body. Move around, gently snapping the locks. A characteristic click will signal success. It's important not to sink the tool too much so as not to damage the inside of the tank.
Once all the latches are free, you can gently lift the top, and inside you'll see the main unit, which has a fan motor, a control board, and an ultrasonic emitter, all of which are fixed on a metal or plastic base.
The secret to removing tight latches
Notice the location of the sensors. This model uses an optical or capacitive water level sensor that can become contaminated, and its careful cleaning often solves the problem of false "no water" signal.
Disassembly of the mechanical part and the moisture system
The central element of the mechanics is the fan and the ultrasonic membrane, and the fan is usually attached to four screws and connected to the board with a connector, and to remove it, you need to disconnect the connector, remembering its position beforehand.
The ultrasonic membrane is at the bottom, under a rubber pad, and it seals the metal bowl, and if you want to replace it, you need to carefully remove the rubber seal, and underneath it you'll see a circular element that generates cold vapor.
Often the cause of failure is not the membrane itself, but the oxidation of the contacts or the formation of scale on a metalized layer. Cleaning should be done with a soft cloth soaked in citric acid or a special scale remedy.
- 💧 Remove the remaining water from the bottom bowl before disassembling
- 🔩 Unscrew the screws holding the fan engine
- 🧼 Wash the rubber seals with warm water
- 🔌 Check the density of the membrane contacts
When assembling a mechanical part, it is critical to properly install rubber gaskets, which prevent water from flowing into electronic components, which is the main cause of short circuits.
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To lubricate the fan bushings, use silicone lubrication, not WD-40 or oil. WD-40 can corrode the plastic, and the oil will thicken over time and create a cork.
Work with sensors and control boards
The electronic control unit in Xiaomi Smartmi 2 is located at the bottom of the device, isolated from water. However, condensate can still get to the contacts. The board is fixed with screws and connected to other nodes with plumes.
Pay special attention to the humidity sensor, which is exposed out through holes in the case, if it is contaminated with dust, the reading will be incorrect, carefully blow this unit with compressed air or clean it with a soft brush.
Visually inspect the board for swollen capacitors or corrosion, and if you find oxides, they can be carefully removed with alcohol and a toothbrush. SMD-component.
| Component | Location. | Frequent problem | Decision |
|---|---|---|---|
| Ultrasonic membrane | Bottom of the bowl | Scale, break. | Acid purification or substitution |
| Fan | Upper part | Noise, jamming | Lubrication of the sleeve, cleaning of the blades |
| Level sensor | Bowl side | False signal | Wiping contacts |
| Management fee | Bottom of the hull | Oxidation | Cleaning with alcohol, drying |
If the device does not turn on after cleaning the board, the fuse or transformer may have failed, and in such cases professional diagnostics with a multimeter is required.
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The main cause of breakdowns of electronics in humidifiers is the ingress of water through the evaporated seal or condensate, so tightness during assembly is more important than speed.
Assembly of the device and checking leakage
The assembly is done in reverse disassembly, make sure that all screws are twisted evenly, without distortion, and pay special attention to the top cover: it should stand in place with a slight click around the perimeter.
Before you turn on, do a visual check. There should be no extra parts, wires or tools anywhere, and make sure that the rubber seals are in their grooves and do not protrude outward.
Pour a little water and leave the device on a dry surface for 10-15 minutes, so you can see if there's any leaks before the water gets to the electronics, and if it's dry, you can go to test run.
Turn on the humidifier and check all modes. Pay attention to the noise level: if there is a hum, then the fan is assembled incorrectly or hits the body, in which case you will have to disassemble the device again.